#! /bin/bash 

name="Harvest"

# 使用双引号拼接
greeting="hello, "$name" !"
greeting_1="hello, ${name} !"
echo $greeting $greeting_1

# 使用单引号拼接
greeting_2='hello, '$name' !'
greeting_3='hello, ${name} !'
echo $greeting_2 $greeting_3

